Propeller spinner



Aug. 19, 1930. c. F. RAUEN PROPELLER summa F'i1ed Feb. 18, 1928 E*atened Aug. 19, 193@ UETE@ STATES PATENT OFFICE GAR]; F. BAUEN, 01? DAYTON, OHIO, ASSIGNOR T0 BEND'IX .AVIATIN' COBPOBATION, OB NEW YORK, N. Y., A COBPORATION 013 DELAWABE PROPELLER SPIN N ER Application flled !February 18, 1928. Seria1l N0. 255,343,

This invention relates to aircraft, but more particularly t0 propeller spinner s for same, and the invention has for its ob ect to previde a clevice 0f this dass which is simple 1n its construction, cheap and eusy'to manufacture, strong, durable and eflicient.

A further object of the invent;on 1s to provide a propeller spinner which 1s ea sy to fit to the propeller and which can be qu1ckly assembled, and which is smooth and regular in contour and formation.

With these objects in view, the invent1on consists of the novel construction a nd arrangement of the spinner, and in eerta1n combinations of parts, all of which 1s first fully described and afterwards specifically po1nted out in the appended claims.

Referrin to the accompanying dravymg:

Figure 1 1s a vertica.l longitudinal sect10nal view of a spinner consitructed in accordance with t-his invention; and"a Figure 2 is a front elevfltion of the same.

Like numerals of referehce indicate the same parts throughout the 0 figures, in which:

1 indicates the spinner, which includes the nose cap 2, cowl 3 and rear-plate section 4.

The nose cap 2 which is cone shaped as shown, is flanged a1: its forward end at 5, and preferably riveted at 6 between two centrally apertured discs 7 and 8, 130 receive a holt 9 assing from the hub of the propeller, which ub, propeller and its immediately associated arts are shown in dotted lines in Figure 1.

The cowl 3 is formed in the form 0f a truncated cone, the head 10 of which is likewise riveted ab 11 between two stiflening plates 12 and 13 arranged to be clamped between the propeller-hub-fastening elements in order to properly center the cowl 3, and I have shown the unter portion of the front stifl'ening platze 13 reduced in thickness at 14, so that a thin 'tool 0r implement may be inserted behind the adjacent lock washer shown in dotted lines, in order to conveniently bend the edges of said lock washer, as is done in the preferred assembly of the propeller-hub parts.

The surface 15 of the cowl 3 immediately adjacent t'he head 10 is slightly contracted to receive the open end of the nose cap 2 to center the rear end of said nose cap, and to provide a, shoulder 16, against which the edge 17 of the nose cap 2 f etches up to limit any undue telescoping of the nose cap 2 over the cowl 3, and further t0 provide a smooth uninterrupted formation.

The rear plate section 4 is likewise in the form of a truncated cone, the head of which forms the rear plate 18, to which is riveted at 19 a stifl'ening plate 20 centered on the ropeller hub and bolted to a member of the propeller hub asselmbly by bolts 21.

The surface 22 of the rear-plate section 4 immediately adjacent its platze 18, is likewise slightly contracted to receive the open end 0f the cowl 3 to center the rear end of the said cowl und to provide a shoulder 23, against which the edge 24 of the cowl 3 fetchesup to limit any undue telescoping of the cowl 3 over the rear-plate section 4, and further to provide a smooth uninterrupted formation. The overlap'ping edge of the cowl may be bolted to the reduced portion 22 of the rearplate section by bolts 25, while the rear edge of said rezir-plate section may be flanged inwardly at 26 t0 finish and stifl'en the same.

Having thus described the invention the parts are assembled as follows:

The rear-plate section is passed over the propeller shaft and the propeller is plac ed in position. The cowl 3 which is provided with a plurality of U-shapetfslots 27 arranged therein t0 accommodate the blades of the propeller, is then passed over the propeller hub and into position shown in Figure 1. The propeller-hub assembly is then completed which operation clamps and centers the head 10 of the cowl in operative position, and the nose cap 2 is then applied to the cowl 3 and secured by the nut 28 011 the holt 9, to complete the spmner assembly.

Having thus fully des'cribed the invention, I do not wish to be understood as limiting myself to the exact construction herein set forth, but consider myself clearly entitled to all such changes and modifications as fall within the limit and scope of the appended claims What I claim es new and.desire to secure by Letters Patent of the United States is:

1. A device o:f the character described i ncluding a cone-shaped nose cap having 1ts outer end flanged inwardly, centrally apertured rein'forcmg means receivin the inwardly flanged end, a truncate conical shaPed cowl apertured to receive the blades of a. ropeller und including a.head f0r centering the cowl on' the ropeller h1 b assembly, means for stiflemng und remforcmg said head, said stiifen'ing and reinforciqg nieans being adupted to be clamged by sard ropeller hub assembly, the port1on of s a1d cowl immediately adjacent seid head bemg reduc6d to provide a. shoulder to receive the 0 en end of seid nose cap, a. truncated conical s aped back-plate section including a. backplate for centering the same on the propeller hub assembly and ada ted to be fastened thereto, the portion of t e back-platze section immediately adjacent seid back-plate being reduced to rovide a shoulder to receive the open end 0 seid cowl, and means for fastenin the cowl to said reduced. portion, the w ole arranged as and for the purposes sei: forth.

2. A device of the character described including a nose cap,centrally apertured reinforcing means for the outer end thereof, a truncated conical shaped cowl apertured to receive the blades of a ropeller, and includin a head for c entering the cowl on the prope 1er hub assembly, means for stifl'ening and reinforcing sai(l head, the portion of said cowl immediately adjacent seid head being reduced to provide a shoulder to receive the open end of said nose cap, a trimcated conical shaped back-plafie section including a backplate f0r centering the same on the propeller hub assembly, the ortion of the back-plate section immediately adjacent seid batzk-plate being reduced to' provide a shoulder to receive the open end of said cowl.

3. A devi ce of the character described including a nose cap, a truncated conical shaped cowl apertured to receive the blades of a. propeller end including a head for canterin the cowl on the propieller hub assembly, t e portion of seid cowl immediately adjacent said head being reduced to provide a. shoulder to receive the open end ofsaid nose cap, a truncated conical shaped back-plate section including a back-place for centering the same on the propeller hub assembly, the portion of the backlate section immediately adjacent said bac -plate being reduced to provide a shou lder to receive the open end of said cowl.

4. A deviee of the character described includin a nose cap, a, truncated c01'1ical shape cowl apertured to receive the blades of a propeller and including a head for centering the cowl on the ropeller hub assembly, end including a stepped reduction to form an peller hub assembly, and a truncated conical shaped back-plate section including a back for centering the same on the propeller hub assembly. v

6. A device of the character described. including a cone-shaped nose cap having its outer end flanged inwardly, centrally apertured reinforcing means receivi1w the inwardly flanged end, a. truncate conical shaped cowl provided with U-shaped. slots to receive the blades of a propeller und including a head for centering the cowl on the propeller hub assembly, means f or stifiening and reinforcing said head, said stiflening end reinforcing means being adapted to be clamped by said propeller hub assembly, the portion of said cowl immediatelv adjacent said head being reduced to provie a shoulder to receive the open end 0f said nose cap, a truncated conical shaped back-plate section including a back-plate for centering the same on the propeller hub assembly und adapted to be fastened thereto, the portion of the back-plate sect-ion immediately adjacent said back-plate being reduced to provide a shoulder to receive the open end of said cowl, und means for fastening the cowl to said reduced port-ion, the whole arranged as und for the purposes set forth.

7 A device o:f the character described including a nose cap,- centrally apertured reinforci ng means for the outer end thertaof, a truncated conical shaped cowl provided with U-shaped slots to receive the blades cf a ropeller, and including a head for centering the cowl 011 the propeller hub assembly, means for stifl'ening and reinforcing seid head, the portion of said cowl immediat ely adjacent said head being reduced to provide a shoulder to receive the open end of said nose cap,

a truncated conical shape d back-platze secti0n including a back-platze for centering the same 011 the ropeller hub assembly, the portion of the back-plate section immediately adjacent said back-plate being reduced to provide a shoulder to receive the open end of said said eowl immediately adjacent seid hea.d

being reduced to provide a shoulder to receive the open end cf said nose cap, a trancated conical shap'ed back plate sect-ion including a back plate for centering the same on the propeller hu b assembly, the portion of the back plate section immediately adjacent said back plate being reduced to provide a slioulder to receive the open end cf said cow 9. A device cf the character described including a nose cap, a truncated conical shaped cowl provided with U-shaped slots to receive the blades of a Propeller and includin a head for centering the cowl on the propel er hub assembly, and including a stepped vreduction to form an annular portion for receiving the open end cf said nose cap, a truncated conical shaped.back plate section including a back plate for centering the same on the propeller hub assembly and including means for receiving the open end of the said cowl.

10. A devme of the character described including a nose cap, a truncated conical shaped cowl provided with U-shaped slots to receive the blades of a propeller and including a head provided with a stepped portion for centering the cowl on the propeller hub ascembly, and a truncated conical shaped back plate section includinga back for centering the same on the propeller hub assembly.

11. In a spinner structure for aircraft propellers comprising a nose positioned in advance of said propeller, a back plate rearward of saidpropeller and a unitary cowl section and head interposed between said nose cap and said back plate, said head having centering means for centering said cowl and nose ca m 2. In a spinner structure for aircraft propellers comprising a nose cap rigidly cannected to the Propeller, und a cowl section, substantially enclosing the ropeller hub, said cowl section having front and back m plates secured to said propeller and provided with peripheral recesses to receive the rear edges of said nose cap and cowl respectively thereby presentin a smooth contour.

In testim ony w ereof I aflix m signature. CARL F. AUEN. 

